Elena 8 tokens for $4.40. At this rate how much do 19 tokens cost

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.